Method and device for transmitting preamble sequence

A device for extracting a sequence and comprising a microprocessor, the microprocessor comprising:

• a ternary preamble sequence acquirer configured to acquire a ternary preamble sequence including elements −1, 0, and 1;
• a first sequence extractor configured to extract a first sequence including elements 0 and 1 for a non-coherent receiver from the ternary preamble sequence;
• and
• a second sequence extractor configured to extract a second sequence including elements −1 and h for a coherent receiver.

A transmitter comprising:

• a base preamble extractor configured to extract a base preamble pattern and a certain number of repetitions based on a first preamble format P1 or a second preamble format P2 from a pre-stored table;
• a preamble sequence generator configured to generate a preamble sequence supported by both a non-coherent receiver and a coherent receiver by repeating the base preamble pattern by the certain number of repetitions;
• and
• a frame transmitter configured to transmit a transmission frame including a preamble field including the preamble sequence, a start frame delimiter (SFD) field, a physical layer header (PHR) field, and a physical service data unit (PSDU) field to at least one among the non-coherent receiver and the coherent receiver.
• Number of
• Preamble
• repetitions
• format
• Base preamble pattern
• (Nrep)
• P1
• [1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 −1 −1
• 4
• 0 0 1 −1 0 0 1 −1 0 0 1 −1 0 0 −1]
• P2
• [1 0 −1 0 0 −1 0 −1 1 0 1 0 0 −1 0 1
• 8
• 1 0 1 0 0 −1 0 1 −1 0 1 0 0 1 0 1]